ML031190352

TS Bases Changes

ML031190352
Person / Time
Site:	McGuire, Mcguire   (NPF-009, NPF-017)
Issue date:	04/22/2003
From:	Jamil D Duke Power Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML031190352 (24)

Text

Duke Power P Duke McGuire Nuclear Station c 0 Power.

12700 Hagers Ferry Road A We E-Camp..

Huntersville, NC 28078-9340 (704) 875-4000 D. M. Jarnil Vice President. McGuire (704) 875-5333 OFFICE Nuclear Generation Department (704) 8754809 FAX April 22, 2003 United States Nuclear Regulatory Commission ATTENTION:

Document Control Desk Washington, DC 20555-0001

Subject:

Duke Energy Corporation McGuire Nuclear Station Units 1 and 2 Docket Nos. 50-369 and 50-370 Technical Specification Bases Changes Attached is a revision to McGuire Technical Specification (TS) Bases Manual Section 3.7.11, Auxiliary Building Filtered Ventilation Exhaust System (ABFVES).

This revision has been implemented in accordance with the TS Bases Control Program as described in TS 5.5.14.

This revision includes the following change:

Historical information was added to the Background section of the Bases so that the design and licensing basis of the ABFVES will be better understood and documented.

Similar information was added to the McGuire UFSAR. contains the revised TS Bases List of Effective Sections. contains revised TS Bases 3.7.11.

Please contact Lee Hentz at 704-875-4187 if you have any questions.

Sincerely, D. M. Jamil Attachments

U.S. Nuclear Regulatory Commission April 22, 2002 Page 2 xc w/attachments:

L. A. Reyes Regional Administrator, Region II U. S. Nuclear Regulatory Commission Atlanta Federal Center 61 Forsyth St., SW, Suite 23T85 Atlanta, GA 30303 R. E. Martin Senior Project Manager U. S. Nuclear Regulatory Commission Mail Stop 0-8G9 Washington, DC 20555-0001 S. M. Shaeffer Senior Resident Inspector U. S. Nuclear Regulatory Commission McGuire Nuclear Station B. 0. Hall Section Chief N.C. Radiation Protection Section 1645 Mail Service Center Raleigh, NC 27699-1645

U. S. Nuclear Regulatory Commission April 22, 2003 Page 3 bc w/attachments:

ELL (ECO50)

B. Beaver (MGOIRC)

K. Crane (MGO1RC)

McGuire Master File 1.3.2.12

ATTACMENT 1 REVISED TECHNICAL SPECIFICATION BASES LIST OF EFFECTIVE SECTIONS

McGuire Nuclear Station Technical Specifications List of Affected Pages / Sections Page Number Amendment ii iii iv 1.1-1 1.1-2 1.1-3 1.1-4 1.1-5 1.1-6 1.1-7 1.2-1 1.2-2 1.2-3 1.3-1 1.3-2 1.3-3 1.3-4 1.3-5 1.3-6 1.3-7 1.3-8 1.3-9 1.3-10 1.3-11 1.3-12 1.3-13 1.4-1 1.4-2 1.4-3 1.4-4 184/166 184/166 184/166 184/166 184/166 184/166 206/187 194/175 206/187 206/187 194/175 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 Revision Date 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 8/23/02 9/18/00 8/23/02 8/23/02 9/18/00 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 McGuire Units 1 and 2 Page 1 Revision 37

Page Number Amendment Revision Date 2.0-1 2.0-2 3.0-1 3.0-2 3.0-3 3.0-4 3.0-5 3.1.1-1 3.1.2-1 3.1.2-2 3.1.3-1 3.1.3-2 3.1.3-3 3.1.4-1 3.1.4-2 3.1.4-3 3.1.4-4 3.1.5-1 3.1.5-2 3.1.6-1 3.1.6-2 3.1.6-3 3.1.7-1 3.1.7-2 3.1.8-1 3.1.8-2 3.2.1-1 3.2.1-2 3.2.1-3 3.2.1-4 3.2.1-5 3.2.2-1 3.2.2-2 184/166 191/172 184/166 184/166 184/166 205/186 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 186/167 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 188/169 188/169 184/166 184/166 9/30/98 3/20/00 9/30/98 9/30/98 9/30/98 8/12/02 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/8/99 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/22/99 9/22/99 9/30/98 9/30/98 McGuire Units 1 and 2 Page 2 Revision 37

Page Number Amendment Revision Date 3.2.2-3 3.2.2-4 3.2.3-1 3.2.4-1 3.2.4-2 3.2.4-3 3.2.4-4 3.3.1-1 3.3.1-2 3.3.1-3 3.3.1-4 3.3.1-5 3.3.1-6 3.3.1-7 3.3.1-8 3.3.1-9 3.3.1-10 3.3.1-11 3.3.1 -12 3.3.1-13 3.3.1-14 3.3.1-15 3.3.1-16 3.3.1-17 3.3.1-18 3.3.1-19 3.3.1-20 3.3.2-1 3.3.2-2 3.3.2-3 3.3.2-4 3.3.2-5 3.3.2-6 184/166 188/169 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 194/175 194/175 194/175 194/175 202/183 202/183 184/166 184/166 184/166 184/166 184/166 184/166 198/179 9/30/98 9/22/99 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/18/00 9/18/00 9/18/00 9/18/00 5/23/02 5/23/02 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 4/12/01 McGuire Units 1 and 2 Page 3 Revision 37

Page Number Amendment Revision Date 3.3.2-7 3.3.2-8 3.3.2-9 3.3.2-10 3.3.2-11 3.3.2-12 3.3.2-13 3.3.2-14 3.3.2-15 3.3.3-1 3.3.3-2 3.3.3-3 3.3.3-4 3.3.4-1 3.3.4-2 3.3.4-3 3.3.5-1 3.3.5-2 3.3.6-1 3.3.6-2 3.3.6-3 3.4.1-1 3.4.1-2 3.4.1-3 3.4.1-4 3.4.2-1 3.4.3-1 3.4.3-2 3.4.3-3 3.4.3-4 3.4.3-5 3.4.3-6 3.4.4-1 198/179 184/166 184/166 194/175 194/175 194/175 198/179 194/175 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 194/175 184/166 184/166 194/175 191/172 191/172 184/166 191/172 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 4/12/01 9/30/98 9/30/98 9/18/00 9/18/00 9/18/00 4/12/01 9/18/00 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/18/00 9/30/98 9/30/98 9/18/00 3/20/00 3/20/00 9/30/98 3/20/00 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 McGuire Units 1 and 2 Page 4 Revision 37

Page Number Amendment Revision Date 3.4.5-1 3.4.5-2 3.4.5-3 3.4.6-1 3.4.6-2 3.4.7-1 3.4.7-2 3.4.8-1 3.4.8-2 3.4.9-1 3.4.9-2 3.4.10-1 3.4.10-2 3.4-11-1 3.4.11-2 3.4-11-3 3.4.11-4 3.4.12-1 3.4.12-2 3.4.12-3 3.4.12-4 3.4.12-5 3.4.12-6 3.4.13-1 3.4.13-2 3.4.14-1 3.4.14-2 3.4.14-3 3.4.14-4 3.4.15-1 3.4.15-2 3.4.15-3 3.4.16-1 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 McGuire Units 1 and 2 Page 5 Revision 37

Page Number Amendment Revision Date 3.4.16-2 3.4.16-3 3.4.16-4 3.4.17-1 3.5.1-1 3.5.1-2 3.5.2-1 3.5.2-2 3.5.2-3 3.5.3-1 3.5.3-2 3.5.4-1 3.5.4-2 3.5.5-1 3.5.5-2 3.6.1-1 3.6.1-2 3.6.2-1 3.6.2-2 3.6.2-3 3.6.2-4 3.6.2-5 3.6.3-1 3.6.3-2 3.6.3-3 3.6.3-4 3.6.3-5 3.6.3-6 3.6.3-7 3.6.4-1 3.6.5-1 3.6.5-2 3.6.6-1 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 207/188 207/188 184/166 184/166 184/166 184/166 207/188 184/166 184/166 184/166 184/166 184/166 207/188 207/188 184/166 184/166 184/166 184/166 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/4/02 9/4/02 9/30/98 9/30/98 9/30/98 9/30/98 9/4/02 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/4/02 9/4/02 9/30/98 9/30/98 9/30/98 9/30/98 McGuire Units 1 and 2 Page 6 Revision 37

Page Number Amendment Revision Date 3.6.6-2 3.6.7-1 3.6.7-2 3.6.8-1 3.6.8-2 3.6.9-1 3.6.9-2 3.6.10-1 3.6.10-2 3.6.11-1 3.6.11-2 3.6.12-1 3.6.12-2 3.6.12-3 3.6.13-1 3.6.13-2 3.6.13-3 3.6.14-1 3.6.14-2 3.6.14-3 3.6.15-1 3.6.15-2 3.6.16-1 3.6.16-2 3.7.1-1 3.7.1-2 3.7.1-3 3.7.2-1 3.7.2-2 3.7.3-1 3.7.3-2 3.7.4-1 3.7.4-2 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 201/182 201/182 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 3/13/02 3/13/02 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 McGuire Units 1 and 2 Page 7 Revision 37

Page Number Amendment Revision Date 3.7.5-1 184/166 9/30/98 3.7.5-2 184/166 9/30/98 3.7.5-3 184/166 9/30/98 3.7.5-4 184/166 9/30/98 3.7.6-1 184/166 9/30/98 3.7.6-2 184/166 9/30/98 3.7.7-1 184/166 9/30/98 3.7.7-2 184/166 9/30/98 3.7.8-1 184/166 9/30/98 3.7.8-2 184/166 9/30/98 3.7.9-1 187/168 9/22/99 3.7.9-2 187/168 9/22/99 3.7.9-3 184/166 9/30/98 3.7.10-1 184/166 9/30/98 3.7.10-2 184/166 9/30/98 3.7.11-1 184/166 9/30/98 3.7.11-2 184/166 9/30/98 3.7.12-1 184/166 9/30/98 3.7.12-2 184/166 9/30/98 3.7.13-1 184/166 9/30/98 3.7.14-1 184/166 9/30/98 3.7.15-1 197/178 11/27/00 3.7.15-2 197/178 11/27/00 3.7.15-3 197/178 11/27/00 3.7.15-4 197/178 11/27/00 3.7.15-5 197/178

.11/27/00 3.7.15-6 197/178 11/27/00 3.7.15-7 197/178 11/27/00 3.7.15-8 197/178 11/27/00 3.7.15-9 210/191 2/4/03 3.7.15-10 210/191 2/4/03 3.7.15-11 2101191 2/4/03 3.7.15-12 197/178 11/27/00 McGuire Units 1 and 2 Page 8 Revision 37

Page Number Amendment Revision Date 3.7.15-13 3.7.15-14 3.7.15-15 3.7.15-16 3.7.15-17 3.7.15-18 3.7.15-19 3.7.15-20 3.7.15-21 3.7.16-1 3.8.1-1 3.8.1-2 3.8.1-3 3.8.1-4 3.8.1-5 3.8.1-6 3.8.1-7 3.8.1-8 3.8.1-9 3.8.1-10 3.8.1-11 3.8.1-12 3.8.1-13 3.8.1-14 3.8.1-15 3.8.2-1 3.8.2-2 3.8.2-3 3.8.3-1 3.8.3-2 3.8.3-3 3.8.4-1 3.8.4-2 197/178 197/178 197/178 210/191 210/191 210/191 210/191 197/178 197/178 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 192/173 184/166 184/166 192/173 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 184/166 11/27/00 11/27/00 11/27/00 2/4/03 2/4/03 2/4/03 2/4/03 11/27/00 11/27/00 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 3/15/00 9/30/98 9/30/98 3/15/00 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 McGuire Units 1 and 2 Page 9 Revision 37

Page Number Amendment Revision Date 3.8.4-3 209/190 12/17/02 3.8.5-1 184/166 9/30/98 3.8.5-2 184/166 9/30/98 3.8.6-1 184/166 9/30/98 3.8.6-2 184/166 9/30/98 3.8.6-3 184/166 9/30/98 3.8.6-4 184/166 9/30/98 3.8.7-1 184/166 9/30/98 3.8.8-1 184/166 9/30/98 3.8.8-2 184/166 9/30/98 3.8.9-1 184/166 9/30/98 3.8.9-2 184/166 9/30/98 3.8.10-1 184/166 9/30/98 3.8.10-2 184/166 9/30/98 3.9.1-1 184/166 9/30/98 3.9.2-1 184/166 9/30/98 3.9.3-1 184/166 9/30/98 3.9.3-2 184/166 9/30/98 3.9.4-1 184/166 9/30/98 3.9.4-2 184/166 9/30/98 3.9.5-1 184/166 9/30/98 3.9.5-2 184/166 9/30/98 3.9.6-1 184/166 9/30/98 3.9.6-2 184/166 9/30/98 3.9.7-1 184/166 9/30/98 4.0.1 210/191 2/4/03 4.0.2 197/178 11/27/00 5.1-1 184/166 9/30/98 5.2-1 184/166 9/30/98 5.2-2 184/166 9/30/98 5.2-3 184/166 v 9/30/98 5.3-1 184/166 9/30/98 5.4-1 184/166 9/30/98 McGuire Units 1 and 2 Page 10 Revision 37

Page Number Amendment Revision Date 5.5-1 211/192 3/12/03 5.5-2 207/188 9/4/02 5.5-3 184/166 9/30/98 5.5-4 184/166 9/30/98 5.5-5 190/171 12/21/99 5.5-6 184/166 9/30/98 5.5-7 184/166 9/30/98 5.5-8 184/166 9130/98 5.5-9 184/166 9/30/98 5.5-10 184/166 9/30/98 5.5-11 184/166 9/30/98 5.5-12 184/166 9/30/98 5.5-13 184/166 9/30/98 5.5-14 196/177 11/2/00 5.5-15 184/166 9/30/98 5.5-16 184/166 9/30/98 5.5-17 204/185 7/17/02 5.5-18 184/166 9/30/98 5.6-1 184/166 9/30/98 5.6-2 208/189 10/1/02 5.6-3 208/189 10/1/02 5.6-4 203/184 7/10/02 5.6-5 184/166 9/30/98 5.7-1 184/166 9/30/98 5.7-2 184/166 9/30/98 BASES (Revised per section) i Revision 0 9/30/98 ii Revision 0 9/30/98 iii Revision 0 9/30/98 B 2.1.1 Revision 0 9/30/98 B 2.1.2 Revision 0 9/30/98 McGuire Units 1 and 2 Page I 1 Revision 37

Page Number Amendment Revision Date B 3.0 Revision 35 8/12/02 B 3.1.1 Revision 0 9/30/98 B 3.1.2 Revision 10 9/22/00 B 3.1.3 Revision 10 9/22/00 B 3.1.4 Revision 0 9/30/98 B 3.1.5 Revision 19 1/10/02 B 3.1.6 Revision 0 9/30/98 B 3.1.7 Revision 15 01/04/01 B 3.1.8 Revision 0 9/30/98 B 3.2.1 Revision 34 10/1/02 B 3.2.2 Revision 10 9/22/00 B 3.2.3 Revision 34 10/1/02 B 3.2.4 Revision 10 9/22/00 B 3.3.1 Revision 31 9/17/02 B 3.3.2 Revision 38 1/30/03 B 3.3.3 Revision 26 1/15/02 B 3.3.4 Revision 0 9/30/98 B 3.3.5 Revision 11 9/18/00 B 3.3.6 Revision 0 9/30/98 B 3.4.1 Revision 8 3/20/00 B 3.4.2 Revision 0 9/30/98 B 3.4.3 Revision 0 9/30/98 B 3.4.4 Revision 0 9/30/98 B 3.4.5 Revision 0 9/30/98 B 3.4.6 Revision 0 9/30/98 B 3.4.7 Revision 0 9/30/98 B 3.4.8 Revision 0 9/30/98 B 3.4.9 Revision 0 9/30/98 B 3.4.10 Revision 0 9/30/98 B 3.4.11 Revision 0 9/30/98 B 3.4.12 Revision 30 8/13/02 B 3.4.13 Revision 0 9/30/98 B 3.4.14 Revision 0 9/30/98 McGuire Units 1 and 2 Page 12 Revision 37

Page Number Amendment Revision Date B 3.4.15 B 3.4.16 B 3.4.17 B 3.5.1 B 3.5.2 B 3.5.3 B 3.5.4 B 3.5.5 B 3.6.1 B 3.6.2 B 3.6.3 B 3.6.4 B 3.6.5 B 3.6.6 B 3.6.7 B 3.6.8 B 3.6.9 B 3.6.10 B 3.6.11 B 3.6.12 B 3.6.13 B 3.6.14 B 3.6.15 B 3.6.16 B 3.7.1 B 3.7.2 B 3.7.3 B 3.7.4 B 3.7.5 B 3.7.6 B 3.7.7 B 3.7.8 B 3.7.9 Revision 0 Revision 0 Revision 0 Revision 30 Revision 1 0 Revision 0 Revision 0 Revision 0 Revision 32 Revision 32 Revision 32 Revision 0 Revision 0 Revision 0 Revision 0 (Pg 4 Rev 3)

Revision 0 Revision 0 Revision 0 Revision 0 Revision 25 Revision 0 Revision 0 Revision 0 Revision 0 Revision 0 Revision 0 Revision 0 Revision 0 Revision 38 Revision 0 Revision 0 Revision 0 Revision 0 9/30/98 9/30/98 9130/98 8/13/02 9/22/00 9/30/98 9/30/98 9/30/98 10/4/02 10/4/02 10/4/02 9/30/98 9/30/98 9/30/98 9/30/98 (Rev 3 9/30/98 9/30/98 9/30/98 9/30/98 3/1 3/02 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 1/30/03 9/30/98 9/30/98 9/30/98 9/30/98 2/99)

McGuire Units 1 and 2 Page 13 Revision 37

I r Page Number Amendment Revision Date B 3.7.10 Revision 0 9/30/98 B 3.7.11 Revision 39 3/19/03 B 3.7.12 Revision 28 5/17/02 B 3.7.13 Revision 0 9/30/98 B 3.7.14 Revision 37 2/4/03 B 3.7.15 Revision 37 2/4/03 B 3.7.16 Revision 0 9/30/98 B 3.8.1 Revision 13 1/18/01 B 3.8.2 Revision 21 1/8/02 B 3.8.3 Revision 0 9/30/98 B 3.8.4 Revision 36 12/17/02 B 3.8.5 Revision 0 9/30/98 B 3.8.6 Revision 0 9/30/98 B 3.8.7 Revision 20 1/10/02 B 3.8.8 Revision 0 9/30/98 B 3.8.9 Revision 24 2/4/02 B 3.8.10 Revision 0 9/30/98 B 3.9.1 Revision 0 9/30/98 B 3.9.2 Revision 0 9/30/98 B 3.9.3 Revision 27 5/14/02 B 3.9.4 Revision 0 9/30/98 B 3.9.5 Revision 0 9/30/98 B 3.9.6 Revision 0 9/30/98 B 3.9.7 Revision 0 9/30/98 McGuire Units 1 and 2 Page 14 Revision 37

ATTACHMENT 2 REVISED TECHNICAL SPECIFICATION BASES 3.7.11

ABFVES B 3.7.11 B 3.7 PLANT SYSTEMS B 3.7.11 Auxiliary Building Filtered Ventilation Exhaust System (ABFVES)

BASES BACKGROUND The ABFVES filters air from the area of the active ECCS components during the recirculation phase of a loss of coolant accident (LOCA).

The ABFVES, in conjunction with other normally operating systems, also provides environmental control of temperature and humidity in the ECCS pump room area and the auxiliary building.

The ABFVES consists of a system, made up of prefilter, a high efficiency particulate air (HEPA) filter, a carbon adsorber section for removal of gaseous activity (principally iodines), and two fans.

Ductwork, valves or dampers, and instrumentation also form part of the system. The system initiates filtered ventilation of the pump room following receipt of a safety injection (SI) signal.

The ABFVE systems are designed to be shared between units. Each unit's system is constructed with two 50% capacity fans providing flow to a 100% capacity filter package. With this design, both Units 1's and Units 2's ABFVE systems are required to be OPERABLE with either unit in MODES 1, 2, 3, or 4.

The ABFVES is a standby system, aligned to bypass the system HEPA filters and carbon adsorbers. During emergency operations, the ABFVES dampers are realigned to begin filtration. Upon receipt of the actuating Engineered Safety Feature Actuation System signal(s), air is pulled from the mechanical penetration area and the ECCS pump rooms, and the stream of ventilation air discharges through the system filters. The prefilters remove any large particles in the air, and any entrained water droplets present, to prevent excessive loading of the HEPA filters and carbon adsorbers.

The ABFVES was not initially designed as a safety related system.

However, during initial plant licensing, the ABFVES was re-classified as an engineered safety feature (ESF) atmosphere cleanup system and partially upgraded to meet most of the recommendations of Regulatory Guide 1.52. A comparison of the current ABFVES design to Regulatory Guide 1.52 (Ref. 6) is presented in UFSAR Table 9-38 (Ref. 8) and is discussed in UFSAR Section 9.4 (Ref. 1).

McGuire Units 1 and 2 B 3.7.1 1-1 Revision No. 39

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ABFVES B 3.7.11 BASES BACKGROUND (Continued)

The ABFVES is discussed in the UFSAR, Sections 9.4,12.2, and 15.6.5 (Refs. 1, 2, and 3, respectively) since it may be used for normal, as well as post accident, atmospheric cleanup functions.

APPLICABLE SAFETY ANALYSES The design basis of the ABFVES is established by the large break LOCA. The system evaluation assumes a passive failure of the ECCS outside containment, such as an Si pump seal failure, during the recirculation mode. In such a case, the system limits radioactive release to within the 10 CFR 100 (Ref. 4) limits, or the NRC staff approved licensing basis (e.g., a specified fraction of Reference 5 limits). The analysis of the effects and consequences of a large break LOCA is presented in Reference 3. The ABFVES also actuates following a small break LOCA, in those cases where the ECCS goes into the recirculation mode of long term cooling, to clean up releases of smaller leaks, such as from valve stem packing.

Two types of system failures are considered in the accident analysis: complete loss of function, and excessive LEAKAGE.

Either type of failure may result in a lower efficiency of removal for any gaseous and particulate activity released to the ECCS pump rooms following a LOCA.

The ABFVES satisfies Criterion 3 of 10 CFR 50.36 (Ref. 5).

LCO The ABFVES is required to be OPERABLE with either unit in MODES 1, 2, 3, or 4. Total system failure could result in the atmospheric release from the ECCS pump room exceeding 10 CFR1 100 limits in the event of a Design Basis Accident (DBA).

ABFVES is considered OPERABLE when the individual components necessary to maintain the ECCS pump room filtration are OPERABLE in both units systems.

An ABFVES is considered OPERABLE when its associated:

a.

Fans in configuration as described below are OPERABLE:

Both fans OPERABLE in any one set of fans listed below:

1A and 1B, or 2A and 2B, or 1A and 2A, or 1 B and 2B McGuire Units 1 and 2 B 3.7.1 1-2 Revision No. 39

ABFVES B 3.7.11 BASES LCO (continued)

Use of any other two fan combination requires surveillance testing in that configuration prior to taking credit for that combination.

b.

HEPA filter and carbon adsorbers are not excessively restricting flow, and are capable of performing their filtration functions; and

c.

Ductwork, valves, and dampers are OPERABLE and air circulation can be maintained.

The ABFVES is shared between the two units. The system must be OPERABLE for each unit when that unit is in the MODE of Applicability. Additionally, both normal and emergency power must also be OPERABLE because the system is shared. If a ABFVES component becomes inoperable, or normal or emergency power to a ABFVES component becomes inoperable, then the Required Actions of this LCO must be entered independently for each unit that is in the MODE of applicability of the LCO.

APPLICABILITY Either unit in MODES 1, 2, 3, and 4, the ABFVES is required to be OPERABLE consistent with the OPERABILITY requirements of the ECCS.

Both units in MODE 5 or 6, the ABFVES is not required to be OPERABLE since the ECCS is not required to be OPERABLE.

ACTIONS A.1 With one unit's ABFVES inoperable, action must be taken to restore OPERABLE status within 7 days. During this time, the remaining OPERABLE unit's system is adequate to perform the ABFVES function. One unit's system of ABFVES may be made inoperable from, but not limited to, the filter assembly, fans, flowpath, or the ability to maintain the required negative 0.125 inches of water gauge (wg) for the ECCS pump rooms relative to atmospheric pressure.

The 7 day Completion Time is appropriate because the risk contribution is less than that for the ECCS (72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> Completion Time), and this system is not a direct support system for the ECCS. The 7 day Completion Time is based on the low McGuire Units 1 and 2 B 3.7.1 1-3 Revision No. 39

ABFVES B 3.7.11 BASES ACTIONS (continued) probability of a DBA occurring during this time period, and ability of the remaining unit's system to provide the required capability.

B.1 With both unit's ABFVE systems inoperable, action must be taken to restore to OPERABLE status one unit's ABFVE system within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Completion Time is based on an adequate period of time to determine the cause of the inoperability and affect repairs without the need of shutting down both units. In addition, the probability of a DBA is low for this short period of time.

C.1 and C.2 If the ABFVES cannot be restored to OPERABLE status within the associated Completion Time, the unit must be placed in a MODE in which the LCO does not apply. To achieve this status, the unit must be placed in at least MODE 3 within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and in MODE 5 within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. The allowed Completion Times are reasonable, based on operating experience, to reach the required unit conditions from full power conditions in an orderly manner and without challenging unit systems.

SURVEILLANCE SR 3.7.11.1 REQUIREMENTS Standby systems should be checked periodically to ensure that they function properly. As the environment and normal operating conditions on this system are not severe, testing each train once a month provides an adequate check on this system. Systems without heaters need only be operated from the control room for

> 15 minutes with flow through the HEPA filters and charcoal adsorbers to demonstrate the function of the system. The 31 day Frequency is based on the known reliability of equipment.

SR 3.7.11.2 This SR verifies that the required ABFVES testing is performed in accordance with the Ventilation Filter Testing Program (VFTP).

The ABFVES filter tests are in accordance with Reference 4. The VFTP includes testing HEPA filter performance, carbon adsorbers efficiency, minimum system flow rate, and the physical properties of the carbon (general use and following specific operations).

McGuire Units 1 and 2 B 3.7.11-4 Revision No. 39

ABFVES B 3.7.11 BASES SURVEILLANCE REQUIREMENTS (continued)

Specific test Frequencies and additional information are discussed in detail in the VFTP.

SR 3.7.11.3 This SR verifies that ABFVES starts and operates with flow through the HEPA filters and charcoal adsorbers on an actual or simulated actuation signal. The 18 month Frequency is consistent with that specified in Regulatory Guide 1.52 (Ref. 6).

SR 3.7.11.4 This SR verifies the integrity of the ECCS pump room enclosure.

The ability of the ECCS pump room to maintain a negative pressure, with respect to potentially uncontaminated adjacent areas, is periodically tested to verify proper functioning of the ABFVES. During the post accident mode of operation, the ABFVES is designed to maintain a slight negative pressure in the ECCS pump room area, with respect to adjacent areas, to prevent unfiltered LEAKAGE. The ABFVES is designed to maintain a

< -0.125 inches water gauge relative to atmospheric pressure.

This SR is required to be performed for each fan combination (1A and 1 B, 2A and 2B, 1A and 2A, 1 B and 2B) described in the LCO Bases. The Frequency of 18 months is consistent with the guidance provided in NUREG-0800, Section 6.5.1 (Ref. 7).

An 18 month Frequency on a STAGGERED TEST BASIS is consistent with that specified in Reference 6.

REFERENCES

1.

UFSAR, Section 9.4.

2.

UFSAR, Section 12.2.

3.

UFSAR, Section 15.6.5.

4.

10 CFR 100.11.

5.

10 CFR 50.36, Technical Specifications, (c)(2)(ii).

6.

Regulatory Guide 1.52 (Rev. 2).

7.

NUREG-0800, Section 6.5.1, Rev. 2, July 1981.

8.

UFSAR, Table 9-38.

McGuire Units 1 and 2 B 3.7.1 1-5 Revision No. 39